Magic Cube

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// Copyright 2021 Leszek Koltunski                                                               //

//                                                                                               //

// This file is part of Magic Cube.                                                              //

//                                                                                               //

// Magic Cube is free software: you can redistribute it and/or modify                            //

// it under the terms of the GNU General Public License as published by                          //

// the Free Software Foundation, either version 2 of the License, or                             //

// (at your option) any later version.                                                           //

//                                                                                               //

// Magic Cube is distributed in the hope that it will be useful,                                 //

// but WITHOUT ANY WARRANTY; without even the implied warranty of                                //

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the                                 //

// GNU General Public License for more details.                                                  //

//                                                                                               //

// You should have received a copy of the GNU General Public License                             //

// along with Magic Cube.  If not, see <http://www.gnu.org/licenses/>.                           //

///////////////////////////////////////////////////////////////////////////////////////////////////

package org.distorted.helpers;

import java.util.ArrayList;

import android.app.Activity;

import android.view.View;

import android.widget.ImageButton;

import android.widget.LinearLayout;

import org.distorted.objectlib.helpers.MovesFinished;

import org.distorted.objectlib.main.ObjectControl;

import org.distorted.main.R;

import org.distorted.main.RubikActivity;

///////////////////////////////////////////////////////////////////////////////////////////////////

public class MovesController implements MovesFinished

  {

  private static final int MOVES_PLACE_0 = 100;

  private static final int MILLIS_PER_DEGREE = 6;

  private static class Move

    {

    private final int mAxis, mRow, mAngle;

    Move(int axis, int row, int angle)

      {

      mAxis = axis;

      mRow  = row;

      mAngle= angle;

      }

    }

  private final ArrayList<Move> mMoves;

  private boolean mCanPrevMove;

  private ObjectControl mControl;

  private ImageButton mPrevButton;

///////////////////////////////////////////////////////////////////////////////////////////////////

// PUBLIC API

  public MovesController()

    {

    mCanPrevMove = true;

    mMoves       = new ArrayList<>();

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private int getPrevIcon(boolean on)

    {

    if( on )

      {

      return RubikActivity.getDrawable(R.drawable.ui_small_cube_back,

                                       R.drawable.ui_medium_cube_back,

                                       R.drawable.ui_big_cube_back,

                                       R.drawable.ui_huge_cube_back);

      }

    else

      {

      return RubikActivity.getDrawable(R.drawable.ui_small_cube_grey,

                                       R.drawable.ui_medium_cube_grey,

                                       R.drawable.ui_big_cube_grey,

                                       R.drawable.ui_huge_cube_grey);

      }

    }

//////////////////////////////////////////////////////////////////////////////////////////////////

  public void backMove(Activity act, ObjectControl control)

    {

    if( mCanPrevMove )

      {

      int numMoves = mMoves.size();

      if( numMoves>0 )

        {

        Move move   = mMoves.remove(numMoves-1);

        int axis    = move.mAxis;

        int angle   = move.mAngle;

        if( angle!=0 )

          {

          mCanPrevMove = false;

          mControl = control;

          mControl.blockTouch(MOVES_PLACE_0);

          mControl.addRotation(this, axis, (1<<move.mRow), -angle, MILLIS_PER_DEGREE);

          }

        else

          {

          android.util.Log.e("solution", "error: trying to back move of angle 0");

          }

        if( numMoves==1 ) changeBackMove(act, false);

        }

      }

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  private void changeBackMove(Activity act, final boolean on)

    {

    act.runOnUiThread(new Runnable()

      {

      @Override

      public void run()

        {

        if( mPrevButton!=null )

          mPrevButton.setImageResource(getPrevIcon(on));

        }

      });

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void addMove(Activity act, int axis, int row, int angle)

    {

    if( mMoves.isEmpty() ) changeBackMove(act,true);

    mMoves.add(new Move(axis,row,angle));

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void onActionFinished(final long effectID)

    {

    mCanPrevMove = true;

    mControl.unblockTouch();

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void clearMoves(final Activity act)

    {

    mMoves.clear();

    changeBackMove(act,false);

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public int getNumMoves()

    {

    return mMoves.size();

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public void setupButton(final Activity act, ObjectControl control, final float width)

    {

    final int icon = getPrevIcon( !mMoves.isEmpty() );

    mPrevButton = new TransparentImageButton(act, icon, width, LinearLayout.LayoutParams.MATCH_PARENT);

    mPrevButton.setOnClickListener( new View.OnClickListener()

      {

      @Override

      public void onClick(View v)

        {

        backMove(act,control);

        }

      });

    }

///////////////////////////////////////////////////////////////////////////////////////////////////

  public ImageButton getButton()

    {

    return mPrevButton;

    }

  }